CSAT Suneung · Physics I
Mechanics and energy
9 practice questions, each with the answer and an explanation.
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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.
All 9 questions
- A car moving at 10 m/s accelerates uniformly at 2 m/s2 for 5 s. How far does it travel in this time?
- A 2 kg object is pushed by a net force of 6 N from rest for 4 s. What is its final speed?
- A ball is thrown vertically upward at 20 m/s. Taking g = 10 m/s2 and ignoring air resistance, what is the maximum height?
- An object of mass 3 kg moves at 4 m/s. What is its kinetic energy?
- A 5 kg block is lifted 2 m at constant speed. How much work is done against gravity? (g = 10 m/s2)
- A box slides down a smooth slope of height 5 m starting from rest. Taking the acceleration due to gravity as 10 m per second squared, what is its speed at the bottom?
- A spring has a spring constant of 200 N/m. How much energy is stored when it is stretched by 0.1 m?
- Two objects of masses 2 kg and 3 kg, moving towards each other at 3 m/s and 2 m/s, collide and stick together. What is their common velocity?
- An object of mass 0.5 kg is dropped from rest. What is its momentum after 3 s? (g = 10 m/s2)
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